Retrieves Chat Window configuration information. This is what FrameXML uses to know how to display the actual windows. This configuration information is set via the SetChatWindow...() family of functions which causes the "UPDATE_CHAT_WINDOWS" event to fire. FrameXML calls GetChatWindowInfo() when it receives this event.

'frameIndex' can be any chat window index between 1 and NUM_CHAT_WINDOWS. '1' is the main chat window.